Loyc.Maybe Class Reference

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Source file:

• /Core/Loyc.Interfaces/Concrete/Maybe.cs

Static Public Member Functions
static Maybe< T >	Value< T > (T value)
	Returns new Maybe<T>(value). (exists for type inference) More...
static Maybe< T >	AsMaybe< T > (this Nullable< T > val)
	Creates a Maybe{T}, using Maybe{T}.NoValue if and only if the input is null. More...
static Maybe< T >	AsMaybe< T > (this T val)
	Creates a Maybe{T}, using Maybe{T}.NoValue if and only if the input is null. More...
static T	OrNull< T > (this Maybe< T > val)
	Converts Maybe{T} to a Nullable{T} having the same HasValue property. More...
static T	Or< M, T > (this M maybe, T defaultValue)
	Converts IMaybe{T} to T, returning a default value if HasValue is false. More...
static T	Or< M, T > (this M maybe, Func< T > getDefaultValue)
	Converts IMaybe{T} to T, calling a factory function if HasValue is false. More...
static void	Then< T > (this IMaybe< T > maybe, Action< T > then)
	Runs a function if and only if IMaybe{T}.HasValue. More...
static R	Then< T, R > (this IMaybe< T > maybe, Func< T, R > then, Func< R > @else)
	Runs one of two functions depending on whether IMaybe{T}.HasValue. More...
static R	Then< T, R > (this IMaybe< T > maybe, Func< T, R > then, R defaultValue)
	Runs a function if and only if IMaybe{T}.HasValue, returning a default value otherwise. More...

Member Function Documentation

static Maybe<T> Loyc.Maybe.AsMaybe< T > ( this Nullable< T >  val )

inlinestatic

Creates a Maybe{T}, using Maybe{T}.NoValue if and only if the input is null.

Type Constraints

T

:

struct

static Maybe<T> Loyc.Maybe.AsMaybe< T > ( this T  val )

inlinestatic

Creates a Maybe{T}, using Maybe{T}.NoValue if and only if the input is null.

Type Constraints

T

:

class

static T Loyc.Maybe.Or< M, T > ( this M  maybe, T  defaultValue  )

static

Converts IMaybe{T} to T, returning a default value if HasValue is false.

This is like the ?? operator of T?.

Type Constraints

M	:	IMaybe<T>
M	:	maybe.HasValue
M	:	maybe.Value
M	:	defaultValue

static T Loyc.Maybe.Or< M, T > ( this M  maybe, Func< T >  getDefaultValue  )

static

Converts IMaybe{T} to T, calling a factory function if HasValue is false.

This is like the ?? operator of T?.

Type Constraints

M	:	IMaybe<T>
M	:	maybe.HasValue
M	:	maybe.Value
M	:	getDefaultValue()

static T Loyc.Maybe.OrNull< T > ( this Maybe< T >  val )

inlinestatic

Converts Maybe{T} to a Nullable{T} having the same HasValue property.

Type Constraints

T

:

struct

static void Loyc.Maybe.Then< T > ( this IMaybe< T >  maybe, Action< T >  then  )

inlinestatic

Runs a function if and only if IMaybe{T}.HasValue.

static R Loyc.Maybe.Then< T, R > ( this IMaybe< T >  maybe, Func< T, R >  then, Func< R > @  else  )

static

Runs one of two functions depending on whether IMaybe{T}.HasValue.

static R Loyc.Maybe.Then< T, R > ( this IMaybe< T >  maybe, Func< T, R >  then, R  defaultValue  )

static

Runs a function if and only if IMaybe{T}.HasValue, returning a default value otherwise.

static Maybe<T> Loyc.Maybe.Value< T > ( T  value )

inlinestatic

Returns new Maybe<T>(value). (exists for type inference)